63639957 has 8 divisors (see below), whose sum is σ = 86826784. Its totient is φ = 41439888.

The previous prime is 63639943. The next prime is 63639971. The reversal of 63639957 is 75993636.

It is a happy number.

63639957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (63639943) and next prime (63639971).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63639957 - 2¹² = 63635861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63639907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246538 + ... + 246795.

It is an arithmetic number, because the mean of its divisors is an integer number (10853348).

Almost surely, 2^63639957 is an apocalyptic number.

It is an amenable number.

63639957 is a deficient number, since it is larger than the sum of its proper divisors (23186827).

63639957 is a wasteful number, since it uses less digits than its factorization.

63639957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493379.

The product of its digits is 918540, while the sum is 48.

The square root of 63639957 is about 7977.4655749806. The cubic root of 63639957 is about 399.2484994180.

The spelling of 63639957 in words is "sixty-three million, six hundred thirty-nine thousand, nine hundred fifty-seven".